Vaccines Immunogenicity in Renal, Hepatic, Cardiac or Pulmonary Transplanted Children

Not Applicable

Completed

• Conditions: Transplantation
• Interventions: Biological: Recommended vaccine scheme according to French Vaccine Schedule 2015

• Registration Number: NCT03180359
• Lead Sponsor: Hospices Civils de Lyon

Brief Summary

Thanks to improved surgical techniques, postoperative management and immunosuppressive therapies, an increasing number of children benefit from renal, hepatic, cardiac and pulmonary transplantation. Infection is a significant cause of mortality and morbidity in these patients, particularly due to vaccine-preventable diseases. Vaccination is one of the effective means of reducing infection-related mortality in these particularly vulnerable children. It is mostly well-tolerated, but all the more effective as it is performed early before transplantation, at best during a dedicated consultation, according to a vaccine scheme adapted to the immunocompromised child. In the almost constant absence of clinical efficacy data in populations of immunocompromised individuals, vaccine efficacy is most often indirectly estimated by immunogenicity, using protective correlates obtained by extrapolation in immunocompetent individuals.

Primary objective: To estimate the immunogenicity of vaccines recommended in children transplanted or candidate for renal, hepatic, cardiac and pulmonary transplantation, using serological titers measurements before and after a vaccine injection for: influenza, pneumococcus, chicken pox, measles, tetanus, hepatitis A and hepatitis B.

These serological titers will be compared to correlates of protection existing for each valency.

The evolution of serological titers will be described during the first year. The vaccination will be carried out within the routine care, according to the recommendations.

Secondary objectives:

* describe and quantify the vaccination status of patients

* describe the vaccination coverage of their entourage

* evaluate the tolerance and efficacy of vaccines

Detailed Description

Not available

Study Timeline

• Study Start: 2016-01-01
• Study First Submitted: 2017-05-31
• Study First Submitted QC: 2017-06-06
• Study First Posted: 2017-06-08
• Primary Completion: 2019-10-13
• Study Completion: 2019-10-13
• Status Verified: 2023-03
• Last Update Submitted: 2023-03-07
• Last Update Posted: 2023-03-08

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 55

Inclusion Criteria

• children and adolescent between 0 and 17 years old
• registered in the database of the Agency of Biomedicine
• transplanted or waiting for a renal, hepatic, cardiac or pulmonary transplantation
• followed up in the Rhône-Alpes region between January 1st , 2015 and December 31th, 2016
• patients requiring vaccination in standard care

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Exclusion Criteria

• adults
• children or adolescent not able not comply with protocol
• children, adolescent or patient parents or legal guardian not opposed to study participation

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Patient already transplanted or waiting for a transplantation	Recommended vaccine scheme according to French Vaccine Schedule 2015	-

Primary Outcome Measures

Name	Time	Method
Immunogenicity of vaccines recommended in children transplanted or candidate for renal, hepatic, cardiac and pulmonary transplantation	3-month post-transplantation (if transplantation occurs during the study)	The immunogenicity is appraised from serological titer before and after vaccine injection. These serological titers will be compared to existing reference protection correlates for each valency, and defined as protective or non-protective: Tetanus (\>0,1 UI/ml), hepatitis B (\>10 mUI/ml), hepatitis A (\> 20 mUI/ml), measles (0,18 in EIA index), chicken pox (\> 5 gp Elisa UI/ml or \> 50 UI/l with an highly sensitive test), influenza (Hemagglutination Inhibition Assay \> 1/40), pneumococcus (0,35 µg/ml, \> 0,4 mg/l for each specific serotype, if \> 2/3 or 4/6, protecting serotype)

Secondary Outcome Measures

Name	Time	Method
the number of missing injections and supplementary injections	at Month 12	Vaccine status compliance with vaccine recommendation, from literature data and from the opinion of the Vaccine Technical Committee President.; Compliance will be appraised by considering for each valence: * the number of early or late injections; * the number of missing injections and supplementary injections; * the number of days in advance or delayed from recommended injections (per injection and cumulative) 2 age groups will be differentiate : \<2 years (primary vaccination) and \>2 years For each age group, early or late injections are defined by considering literature data and the opinion of the Vaccine Technical Committee President.
Vaccination coverage of patients' entourage	at month 0	Number of missing, additional, early or late injections, compared to vaccine recommendations.
the number of days in advance or delayed from recommended injections (per injection and cumulative)	at Month 12	Vaccine status compliance with vaccine recommendation, from literature data and from the opinion of the Vaccine Technical Committee President.; Compliance will be appraised by considering for each valence: * the number of early or late injections; * the number of missing injections and supplementary injections; * the number of days in advance or delayed from recommended injections (per injection and cumulative) 2 age groups will be differentiate : \<2 years (primary vaccination) and \>2 years For each age group, early or late injections are defined by considering literature data and the opinion of the Vaccine Technical Committee President.
Levels of blood antibodies corresponding to the following vaccine valencies: influenza, pneumococcus, chicken pox (varicella), measles, tetanus, hepatitis A and hepatitis B.	3-month post-transplantation (if transplantation occurs during the study)
the number of early or late injections	at Month 12	Vaccine status compliance with vaccine recommendation, from literature data and from the opinion of the Vaccine Technical Committee President.; Compliance will be appraised by considering for each valence: * the number of early or late injections; * the number of missing injections and supplementary injections; * the number of days in advance or delayed from recommended injections (per injection and cumulative) 2 age groups will be differentiate : \<2 years (primary vaccination) and \>2 years For each age group, early or late injections are defined by considering literature data and the opinion of the Vaccine Technical Committee President.
Patients' vaccine tolerance	at Month 1 after injection	Local reactions, fever, clinical or biological signs of rejection

Trial Locations

Locations (1)

Hospices Civils de Lyon; 🇫🇷 Bron, France